Patent application number | Description | Published |
20130153298 | METHOD AND APPARATUS FOR ENHANCING CELL-EDGE USER PERFORMANCE AND SIGNALING RADIO LINK FAILURE CONDITIONS VIA DOWNLINK COOPERATIVE COMPONENT CARRIERS - A wireless communication network and method are described for enhancing cell-edge performance of a wireless transmit/receive unit (WTRU). The WTRU may establish a connection with a plurality of sites via respective downlinks (DLs). Each DL may include at least one DL component carrier (CC) that operates on a frequency that is the same or different than one or more of the other CCs. The sites may manipulate their transmit power for a particular CC operating frequency such that the distance from a particular one of the sites to its cell boundary may become larger by increasing its transmit power on the particular frequency, and the distance from at least one of the other sites to its respective cell boundary may become smaller by decreasing its transmit power on the particular frequency. Thus, a coverage overlap between different CC frequencies may be created while maintaining a frequency reuse pattern of one. | 06-20-2013 |
20130176988 | DATA SPLIT BETWEEN MULTIPLE SITES - Splitting data in a wireless communications network. Data may be split to use multiple base stations for transmission to user equipment in order to improve the bandwith if a UE is on a cell edge, or may be split by user equipment for transmission to multiple base stations in order to improve handover. Data splitting may be performed at the Packet Data Convergence Protocol layer, at the Radio Link Control layer, or at the Media Access Control layer on user equipment or on a base station. Data may instead be split in a network node, such as in a serving gateway, in Yes order to reduce X2 interface load or delay carrier aggregation. | 07-11-2013 |
20130201912 | METHOD AND APPARATUS FOR COMPRESSING CHANNEL STATE INFORMATION BASED ON PATH LOCATION INFORMATION - Methods and apparatus are described for compressing channel state information (CSI) in time-domain based on path location information for CSI feedback. Downlink (DL) CSI is compressed in the time domain and fed back by not sending the multipath location information, or sending at a very low rate. In one method, a wireless transmit/receive unit (WTRU) selects the strongest multipath components based on channel characteristics. The multipath components are quantized in the time domain via direct or vector based quantization. The base station reconstructs a channel impulse response from the fed back quantized multipath components and applies same to precoding processing. In another method, the WTRU feeds back information associated with a narrowband portion(s) of a system spectrum. The selected narrowband portion(s) have sufficient density over time to allow good precoding per subband or across the system spectrum. Short term feedback may be augmented with long term channel information. | 08-08-2013 |
20130215772 | RECONFIGURATION AND HANDOVER PROCEDURES FOR FUZZY CELLS - A wireless transmit/receive unit (WTRU) may transmit data via multiple component carriers associated with multiple eNode-Bs. The WTRU may receive a handover request message from a source eNode-B. While maintaining a connection with a component carrier on the source eNode-B, the WTRU may establish a connection with another component carrier on a target eNode-B. | 08-22-2013 |
20140153504 | METHOD AND APPARATUS FOR LOCAL DATA CACHING - Methods and apparatus for local data caching are disclosed. Data may be stored in a local data storage connected to a base station or network nodes. The data flow may be split. The base station may coordinate with a cooperating base station for split-data transmission of locally cached data. Data may be split at different layers. | 06-05-2014 |
20140198744 | METHOD AND APPARATUS FOR DATA-SPLITTING TRANSMISSION FROM MULTIPLE SITES - Methods and apparatus for changing cell range coverage are disclosed. The coverage may be changed on a per-sub-frame basis. An antenna beam elevation tilting angle may be adjusted to provide different effective downlink (DL) coverage. For example, a subframe may be a small tilt subframe or a large tilt subframe. A network or evolved NodeB (eNB) may determine data channel transmission power to adjust cell range per subframe. Low Power Subframe (LPS) may be used alone or with Almost Blank Subframe (ABS) to transmit data. Timing Advance (TA) handling for uplink (UL) transmissions is described. A common TA (CTA) may be determined for multi-site UL signaling. UL power control may be determined for UL transmission to multiple sites. Radio Link Monitoring (RLM) may be performed for multiple sites on a carrier frequency. A wireless transmit/receive unit (WTRU) may maintain synchronization in selected subframes for multiple cells. | 07-17-2014 |
20140321282 | HIGH-RATE DUAL-BAND CELLULAR COMMUNICATIONS - A method, apparatus and system for wireless communication are described. The method includes transmitting and receiving data to and from one or more wireless transmit/receive units (WTRUs) via an underlay system access link. The underlay system is non-standalone, and control information is provided from an overlay system. An underlay base station is linked to other underlay base stations to implement a mesh backhaul. The method also includes transmitting and receiving at least a portion of the data to or from an overlay base station via backhaul links and receiving control data from the overlay base station. The data is split at a packet data convergence protocol (PDCP) entity, and the PDCP entity terminates in the overlay base station and a radio link control (RLC) entity terminates in the underlay base station. | 10-30-2014 |